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Streamline U-Boot installation instructions #892

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Jan 29, 2019
Merged

Streamline U-Boot installation instructions #892

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ea6f3a3
Streamline U-Boot installation instructions
akutruff Jan 23, 2019
d47e11e
add more explanation on checking the md5 of the bin
akutruff Jan 23, 2019
9d67686
remove cut/paste error
akutruff Jan 23, 2019
81539a8
Update flashinguboot.md
jmtatsch Jan 29, 2019
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27 changes: 21 additions & 6 deletions hacks/flashinguboot.md
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Expand Up @@ -35,17 +35,32 @@ i.e. you have a device with 128 Mb RAM.
## Flashing the U-Boot bootloader:

1. Login via SSH
2. Get the correct [bootloader](https://github.com/Dafang-Hacks/uboot/tree/master/compiled_bootloader) for your device and RAM size.
3. Put the bootloader file in the root of your microsd card. It will get mounted to /system/sdcard on your camera.
2. Get the correct [bootloader](https://github.com/Dafang-Hacks/uboot/tree/master/compiled_bootloader) for your device and RAM size. NOTE: if you're going to use wget, you need to use the RAW link to the .bin so that you don't accidentally download html.
3. Put the bootloader file in the root of your microsd card `/system/sdcard`.
4. **Verify the MD5 hash of the file!! Do not skip this step or you may brick your camera!**
3. Run the following commands
5. Write the bootloader to flash
6. Rename the uEnv.bootfromnand.txt in your minisd card root to uEnv.txt

```bash
flash_eraseall /dev/mtd0
cd /system/sdcard/

wget https://github.com/Dafang-Hacks/uboot/raw/master/compiled_bootloader/NAME_OF_YOUR_BOOTLOADER_FILE.bin

md5sum NAME_OF_YOUR_BOOTLOADER_FILE.bin
```

Again, do not proceed unless the MD5 matches the version you downloaded. Now erase and write to flash. Do not do anything else between these commands as once you erase, your device will be bricked until you write the .bin.


```bash
flash_eraseall /dev/mtd0

dd if=/system/sdcard/NAME_OF_YOUR_BOOTLOADER_FILE.bin of=/dev/mtd0

mv uEnv.bootfromnand.txt uEnv.txt

```

For example, if you're flashing dafang_128mb_v2.bin, your command should look like this:

```bash
Expand All @@ -56,8 +71,8 @@ Don't do anything stupid inbetween.
If you crash your camera, you end up without a working bootloader.

## Verify that the U-Boot-Loader works correctly
1. Rename the uEnv.bootfromnand.txt in your minisd card root to uEnv.txt
2. Reboot your camera

Reboot your camera

The bootloader is configured to enable the blue led if it has found a valid uEnv.txt during boot up.
Take a look at your LED when it first turns on.
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